serial: sh-sci: use of_property_read_bool()

Use more compact of_property_read_bool() call for a boolean property
instead  of of_find_property() call in sci_parse_dt().
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/sh-sci.c

@@ -3073,8 +3073,7 @@ static struct plat_sci_port *sci_parse_dt(struct platform_device *pdev,
 	p->type = SCI_OF_TYPE(match->data);
 	p->regtype = SCI_OF_REGTYPE(match->data);
 
-	if (of_find_property(np, "uart-has-rtscts", NULL))
-		sp->has_rtscts = true;
+	sp->has_rtscts = of_property_read_bool(np, "uart-has-rtscts");
 
 	return p;
 }